Gem: Hyalite Opal
Weight: 9.7 ctw.
Dimensions: Varies -- 8.2 to 9.5 mm
Clarity: VS as pre-forms, and VVS or better as gems
Origin: Zacatecas, Mexico
Treatments: None
Comments:
This material is amazing, full stop. It's an unassuming trasnparent white color in daylight, but under a UV light, WOW! These babies glow a HARD neon green due to trace amounts of uranium trapped in between the crystal structure. (don't worry, it's background level radiation, like granite countertops, or uranium glass - safe to have in the home, and on you).
These pre-forms were made by me, from clean vein material. Even clean vein material has a lot of fractures and internal crystallization flaws, but this stuff is really high grade, so if you work the stone past those flaws, you can tease out some completely clean sections, suitable for very high end gems!!
Well, I've done the hard part for you in cleaning all of these up, and you can just dop them up, and lay down the facets!
These will facet world class, top quality gems of this type, which are popular, and fairly expensive.